linux-kernel - Re: [PATCH v5 0/8] gpio: renesas: Add support for GPIO and related interrupts in RZ/N1 SoC

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Message-ID: <CACRpkdYwG_rQn7eF9QNfApo+h-BGuC8Q_nPyeAKvcuUh+Bf=Xg@mail.gmail.com>
Date: Tue, 21 Oct 2025 09:13:36 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: "Herve Codina (Schneider Electric)" <herve.codina@...tlin.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Wolfram Sang <wsa+renesas@...g-engineering.com>, 
	Hoan Tran <hoan@...amperecomputing.com>, Bartosz Golaszewski <brgl@...ev.pl>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, Magnus Damm <magnus.damm@...il.com>, 
	Saravana Kannan <saravanak@...gle.com>, Serge Semin <fancer.lancer@...il.com>, 
	Phil Edworthy <phil.edworthy@...esas.com>, linux-gpio@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-renesas-soc@...r.kernel.org, Pascal Eberhard <pascal.eberhard@...com>, 
	Miquel Raynal <miquel.raynal@...tlin.com>, Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v5 0/8] gpio: renesas: Add support for GPIO and related
 interrupts in RZ/N1 SoC

Hi Herve,

On Mon, Oct 20, 2025 at 10:07 AM Herve Codina (Schneider Electric)
<herve.codina@...tlin.com> wrote:

> The first patches in this series are related to a new helper introduced
> to parse an interrupt-map property.
>   - patch 1: Introduce the helper (for_each_of_imap_item)
>   - patch 2: Add a unittest for the new helper
>   - patch 3 and 4: convert existing drivers to use this new helper
>
> Patch 5 adds support for GPIO (device-tree description)
>
> The last patches (6, 7 and 8) of the series are related to GPIO
> interrupts and GPIO IRQ multiplexer.
>
> In the RZ/N1 SoCs, GPIO interrupts are wired to a GPIO IRQ multiplexer.
>
> This multiplexer does nothing but select 8 GPIO IRQ lines out of the 96
> available to wire them to the GIC input lines.

I had my worries about the multiplexer but seeing the whole picture
and the nice refactoring with for_each_of_imap_item() I have to
say the patch series looks very nice.
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij